I have exactly the same problem with this answer. I don't understand why that topic is closed.
I cannot login my desktop for first time after using and trusting the new Ubuntu so many months already.
I have compared my updates history with the link I posted above and I m quite sure that the culprit is on one of these two updates:
PS. I don't want to upgrade to 18.10...wanna stay LTS
SO I WAS RIGHT. Finally I managed to downgrade the gjs and libgjs0 to the previous version and solved my problem.
Now I have to prevent this particular update to happen... HOPE PEOPLE WILL BE MORE CAREFUL WITH UPDATES...
Update: I followed this link to roll back and prevent: Is there any way to roll back the most recent upgrade?
Locking version from synaptic is also an option to block the updates. Cheers
I was having the same problem, but went for a different solution:
I noticed that if I created a new user the login of that user went fine. I assumed then the problem was in my user config. So I made a backup of my home folder and removed my original user.
Then I created it again and login was successful. Of course I have lost all my configs, but the programs were still installed. Then I started to copy back folder by folder from my backup home to my new, clean, home.
I narrowed down the issue to the gnome extensions folder. As soon as I copied it back, the login loop happened again. I can't tell which extension was causing the issue, because I removed the extensions folder and reinstalled them using Chrome.
the folder location is: HOME/.local/share/gnome-shell/extensions
Hope this helps users that had this issue. It was quite painful to see a LTS block in that way.
Cheers
In my case, the problem was the app indicator-multiload, that I had recently installed. So, the solution was simply
sudo apt remove indicator-multiload
I suspect it must have collapsed somehow with the GNOME extensions, in the line of procopiostein's answer .
